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Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

In this design challenge, your child will create a parachute for a small toy using typical household items.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Have your child kick off their summer vacation by making a miniature water slide!

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.